ERSA Pro Stringer Issue 3 - 2018 pro stringer 3 2018.indd - Kopie - Page 25 STRING TEST The static linear traction test from 5 to 35kg tells us that new ALU POWER GREEN string is a MEDIUM- TOUGH string with a constant and linear behavior in all the tension range due to the quality and consistency of the construction material. The dynamic stiffness, measure of comfort and soft impact on the arm during the play, is high with 245g/mm Æ 230lb/inch; as we know ALU POWER is a strong and racing string with consistent impact and very solid stringbed feeling, especially if you string above 22-23kg. The linear stiffness records a 0.85kg/mm (48 lbs/inch); we are in front of a versatile poly string with good combination of power and control with a very strong spin attitude, due to fast response and enhanced ball pocketing; max resilience (elastic response) is positioned in a range from 14-18kg and low stringing tension are recommended (17-23kg) to optimize the response of the filament. Hysteresis test and load-unload cycles test defines a tennis poly extrusion with strong plasticization behavior (excellent ball feeling and contact), appreciable tension decay and noticeable response variation during the first two-four hours of play, typically of all racing oriented strings. The general behavior of the string in green version is very similar to the Alu Power in the classic alu-grey version under all the aspects even if you could feel something slightly different changing with the color, during the impact with the ball (depending from free vibration frequency). A TOP CHOICE FOR COMPETITIVE PLAYERS SEARCHING FOR A TOP LEVEL POWER, CONTROL, AND SPIN STRING WITH THE TYPICAL RESPONSE OF ALU POWER WITH A TOUCH OF….. COLOUR! for more info please check the website Ing. Gabriele Medri pro-t-one tech lab 25 ERSA PRO STRINGER // ISSUE 3-2018